孟加拉国选定热带植物物种中放射性铯从土壤到植物的转移

Soil-to-plant transfer of radiocaesium for selected tropical plant species in Bangladesh.

作者信息

Rahman M M, Rahman M M, Koddus A, Ahmad G U, Voigt G

机构信息

International Atomic Energy Agency, Wagramerstrasse 5, P.O. Box No. 200, A-1400 Vienna, Austria.

出版信息

J Environ Radioact. 2005;83(2):199-211. doi: 10.1016/j.jenvrad.2005.03.004.

DOI:10.1016/j.jenvrad.2005.03.004

PMID:15923070

Abstract

Soil-to-plant transfer factors (TF) of radiocaesium (137Cs) were determined under field condition for grassy vegetation grown in Bangladesh at contaminated land in the Atomic Energy Research Establishment (AERE) campus. TF values for rice, grass and grassy/root vegetations grown in the same type of soil were also measured under pot condition. TF values of 137Cs for grassy vegetation (2.4 x 10(-2) -4.2 x 10(-2) with an average of 3.1 x 10(-2) +/-0.005) obtained under field condition were slightly lower than the values for grass and grassy/root vegetations (2.9 x 10(-2) -6.6 x 10(-2) with an average of 4.8 x 10(-2) +/-0.01 for grass and grassy vegetations and 2.3 x 10(-2) -5.6 x 10(-2) with an average of 4.0 x 10(-2) +/-0.009 for root vegetations, respectively) obtained under pot condition. However, TF values (9.0 x 10(-3) -2.6 x 10(-2) with an average of 1.9 x 10(-2) +/-0.004) obtained for rice were about a factor of 4 lower than the values obtained for grass and grassy/root vegetations. When the properties of the AERE soils as input parameters were used in the soil-plant transfer model of Absalom, the estimated TF values (4.5 x 10(-2) -6.7 x 10(-2) with an average of 5.3 x 10(-2) +/-0.006) were consistent with the measured values obtained for grass and grassy vegetations under pot condition, however, the model overestimates the TF values for rice.

摘要

在原子能研究机构（AERE）校园受污染土地上，于田间条件下测定了孟加拉国生长的草本植被中放射性铯（¹³⁷Cs）的土壤-植物转移因子（TF）。在盆栽条件下，还测量了生长在同类型土壤中的水稻、草和草/根植被的TF值。田间条件下获得的草本植被¹³⁷Cs的TF值（2.4×10⁻² - 4.2×10⁻²，平均为3.1×10⁻²±0.005）略低于盆栽条件下获得的草和草/根植被的TF值（草和草植被为2.9×10⁻² - 6.6×10⁻²，平均为4.8×10⁻²±0.01；根植被为2.3×10⁻² - 5.6×10⁻²，平均为4.0×10⁻²±0.009）。然而，水稻获得的TF值（9.0×10⁻³ - 2.6×10⁻²，平均为1.9×10⁻²±0.004）比草和草/根植被获得的值低约4倍。当将AERE土壤的性质作为输入参数用于Absalom的土壤-植物转移模型时，估计的TF值（4.5×10⁻² - 6.7×10⁻²，平均为5.3×10⁻²±0.006）与盆栽条件下草和草植被的测量值一致，但是该模型高估了水稻的TF值。